Valve for pneumatic tires.



i clear, andexact specification.

f Beit known citizen of the United States,

UNITED sin s PATENT o JOHN w. BLDDGETT, or CHICAGO, rumors.

Application fue@ Aprii 3,1913.

To all whom, it may concern: 4 that I, JOHN and a resident of Chicago, 'in the county of of Illinois, have invented certain 'new and useful Improvements in Valves for neumatic Tires, of which the. following is a ull,

invention is concerned with valves (for pneumatic tires, and is designed t'o'proy duce a simplej and-efficient valve that-will operatepfreely under all conditions, andthatl any desired.

can be set to release the air at avoid possible explosions.

in which the same' ref-v a sheetof drawings, n

used to designate iden'- erence characters are tical parts in all the :`igui es, or1 which,

' and Figs. 4, 5 an the length offthis passage l ing spring Figure 1 is an elevation ofl a valve embodying my invention; Fig. 2 is a longitudinal section through a portion of the saine; Fig. 8 is a com 6 are cross sections, on'a larger scale, on the lines 5;5, and 6-6, respectively, of'Fig. 3.

vIn carrying out my invention ferred form, I employ a. -tu'bular base piece 10, which may be providedwith any suitable means Jfor securing'it to the inner tube 11 of a tire. This base, iece has a passage and opening 'into d the upper portion 13 ofv this passage is preferably enlarged, The outside of theupper endof this tubularbase piece isthreaded for 4a purpose lto be li'ereinafterdescribed. "t Extending into the upper end of this tubuf lar'base piece is a valve tube-14, a passage '15 lextending therethrough. valve stem -16 extends ,substantially from turning therein, preferably-byl having the enlar'ged'- upperf'end 17 square in cross section and coperating with l portion 18 yof the passage 15, likewise square in cross section.- A helically-coiled expanding spring-19 surrounds the valve stem. 16 within the valve tube, being compressed between the-flange 20 atthe end of the valve tube andthe oilset 21 orniedby --the enlargement 17. This'helically-coiled expand-v serves to hold yieldingly the 2 "gainst the valve-seat formed by ci the'tube 14, and the actual A the ,valve and its seat is Specication of Letters Patent.

W. BLooenTr, a

Cook and State i valve cannot be accidentally opened.

valve tube base piece' 10.

lete longitudinal section; p

28,- which preferably has a 'portion as shown.

can possibly escape screw the cap.21 enough'so that by depi A' ing it'the'valve through and is prevented; 1

. ever, instead of employing a short sleeve an enlarged .and having the o upper side. of the-annular lange 26.

i. 0,. ing; img a is tube 11 exceeds the tension of thespring f' vvALvii iron PNEUMATIC 'rinus'.

ing material. It will be understood that invention 4is not conned to the use of specific form of valve and valve seat.-

The upper end of the valve tube' la preferably closed by the cap 2l, which has 'suitable connections with the valve stem-1i'3 for drawing the latter upward so tlfia.;v the @These connections preferably-consist of the screw ag, 2 5rigidly secured lwithin the cap and tending down into the upper end of the 14, and screwed into a threaded aperture formed in the upperr endcf the en largementl?. v

The valve tube 14: has ormednear its lower end an anniilai'lange 26, which rests against a packing ring 27 interposed tween said Aflangeand the top of the tusnl Some means must be previ@ for holding the ange 26 under pre' against the-packing ring 2.7', and font urpose I pref i'ably employ theoutc y 29 the oflhexagonal in itscross section, so the wrench may beapplied thereto il?. 4een il.' e

f the tubular. basejpiece viii;

have a shoulder 3@ on f ing 'directly with the flange 26. Withe a construction, it will beobviousgthat screwing the .sleeve 28 downiintil vthe pr c ing ring27 is thoroughly compressed, ne. t'

from theinner'tube,

out. would beaone way. to -let Athe air 22 can be unseated. i he sleeve 28 be unsci'eived so as to release Y aressure on the packing ring 27, the air,- of course, can escape at this point. Het?" fset 30 coperate rectly with the -flange 26. Ipreferably c ploythe structure actually illustrated in the drawings, ivhere'thesleeve 2S is long, and alielically-coiled expanding spring 31 is interposed between the rshoulder 30 and "the if By 'screwing down the sleeve 2S, it will be olivi-4A ous that the pressure under which the pack held may be varied, and, el. i'ioiisly, when theinternal pressure in the ai the packing rn 2'? will be lifted. e@

ioI

seat on top of the tubular base piece 10, and escape, and thus prevent the posdue to the air there` t e air can 28 down of the spring 31 may be a .invention as embodied in the form Which I capable of modi'cations, and that present consider best adapted to carry out its purposes, it will be understood that it is sitated by the state of lVhat I claim as new, and desire to secure by Letters Patent of the United States, is: v

In a valve, the combination with a tubular upper end of the tube,

have shown and described my base piece, of a valve tube having avalve seat therein,

passage extending therethrough having its upper portion angular in4 cross section, a valve steinextending through said eratlng with the angular portion of said aperture to prevent the stein from turning therein, a valve carried b v said stem coperating with the valve seat, a cap for the a screw rigidly secured within the cap and threaded into an aperture 4formed in the enlarged top of the stem, a packing ring interposed between the base piece and the flange in the valve tube, a sleeve adapted to be screwed on the base piece, and a. helically-coiled expanding spring surrounding the tube between the sleeve and the flange which 'may be com.- pressed suiiiciently by the air to raise the valve tube and release the pressure of the tube -on the packing ring to release the air.

In witness whereof, I have hereunto set my hand and vaffixed my seal,`this 31st day of March, A. 'D. 1913.

JOHN W. litnesses JOHN HOWARD MoELRoY,

MILDRED ELSNER.

BLODGETT. [L 5.]

an annular flange thereon, a.v 

